package fastas3.easing {
public class Exponential {
	public static function easeIn (t:Number, b:Number, c:Number, d:Number):Number {
		return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
	}
	public static function easeOut (t:Number, b:Number, c:Number, d:Number):Number {
		return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
	}
	public static function easeInOut (t:Number, b:Number, c:Number, d:Number):Number {
		if (t==0) return b;
		if (t==d) return b+c;
		if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
		return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
	}
}
}